Bridge for rimless spectacles.



, PATENTED APR. 7,1903. F. A. STEVENS. BRIDGE FOR RIMLESS SPEGTAGLES.

APPLICATION FILED AUG. 31, 1900.

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FREDERICK A. STEVENS, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO ALBERT E.LENZ, OF PROVIDENCE, RHODE ISLAND.

BRIDGE FOR RIMLESS SPECTACLES.

SPECIFICATION forming part of Letters Patent No. 724,7 55, dated April'7, 1903.

Application filed August 31, 1900. Serial No. 28,664. (No model.)

To all whom it may concern:

Be it known that I, FREDERICK A. STEVENS, a citizen of the UnitedStates, residing at Providence, in the county of Providence and State ofRhode Island, have invented a new and useful Improvement in Bridges forRimless Spectacles, of which the following is a specification.

This invention has reference to an improvement in the nose-bridge forrimless spectacles in which the bridge is secured to the lenses; and itconsists in the peculiar and novel construction and the combination ofthe parts whereby the construction of the parts is facilitated and thenose-bridge is more firmly secured to the lenses, as will be more fullyset forth hereinafter.

In rimless spectacles the nose-bridge is soldered to theclamping-pieces, which are secured to the lenses. To secure the requiredbalance, the clam ping-pieces must be secured to the nose bridge atexactly equidistant points. The clamping-pieces secured to the lensesmust be firmly held in place without being clamped so tight as to strainthe lenses. The clamps have therefore been provided with spring crossends which bear on the edges of the lenses. These spring ends asheretofore constructed did not secure the firm hold desired.

The object of this invention is to overcome these defects and facilitatethe manufacture of the devices.

Figure 1 is a side view of my improved nosebridge. Fig. 2 is a view ofthe nose-bridge from below. Fig. 3 is a sectional view of one end of thenose-bridge and the clamp-piece, showing the manner of connectingthe-parts. Fig. 4 is a plan View of a blank for one of the clamp-pieces.Fig. 5 is an end view of one of the clamp-pieces formed from the blankshown in Fig. 4. Fig. 6 is a sectional view at right angles to Fig. 3 ofthe clamp-piece, showing the peculiar construction of the same. Fig. 7is a side View of the completed nosebridge for rimless spectacles readyto receive the lenses and be bent at the opposite ends to bring thelenses into the desired plane or planes.

In the drawings, it indicates the nose-bridge wire, and a a the ends ofthe same. The

under side of these ends I flatten in suitable dies and raise,preferably, the short pins a a These pins serve as guides in solderingthe ends of the nose bridge to the clampingpieces, which are providedwith a cavity (in the preferred form a hole) in which the pins or guidesare placed and held while the parts are secured by solder.

It will be evident that the relative positions of the projecting guidesand the cavities may be reversed, and I do not wish to confine myself toany particular form of the guides, as any suitable projecting guide onone piece may be entered into a corresponding cavity in the other piece.

The clamping-piece b has the two arms b 1) extending at right angles tothe curved bar 6 The guide-cavity b in the curved bar receives theprojecting guide on'one end a of the nose-bridge. The curved b has therigid central portion 19 arched, the inner surface 19 forming a segmentof a circle, the center of which is in the hole b From the central rigidarch 19 extend the tapering spring ends 19 b in opposite directions. Theinner surface of these spring ends b is curved to bear on the peripheraledge of the lens and hold the clamp in the position in which it issocured to the lens.

Having thus described my invention, I claim as new and desire to secureby Letters Patent v 1. The combination in a nose-bridge with thebridge-wire a, the flattened ends a, and the pins oz formed from asingle piece of wire, of the lens-clamp formed with the arms I), theclamping-pieces b and the rigid central portion b provided with theguide-cavity b as and for the purpose described.

2. The combination with the nose-bridge of rimless spectacles having theends a a, and the pins a a on the same, of the clampingpiece b havingthe perforatedarms b'-b, the central, rigid arch b and the spring ends b19 whereby the clamp is held against the'peg ripheral edge of the lens,as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FREDERICK A. STEVENS.

Witnesses:

J. A. MILLER, J r., A. E. HAGERTY.

